有SO =that这种情况吗?什么时候so=that?

1)so that引导目的状语从句时,表示“以便；为了”,从句中常使用can /could /may /might /will /would /should等情态动词或助动词；引导结果状语从句时,从句中一般不用can和may等词,在so that前可以用逗号,意思是“因此;所以”.如：
The little boy saved every coin so that he could buy his mother a present on Mother's day.
2)so＋形容词或副词＋that ...引导结果状语从句.如此……以致于……”.
The sunshine is so beautiful that I'd like to go swimming in the sea.I make $2,000 a week. 60 surely won't make _____D___ difference to me.A.that a big B.a that big C.big a that D.that big a此处that=so，副词，如此，修饰形容词或者副词，且冠词修饰名词这是什么情况？副词that表示“那么……”，修饰形容词的固定短语为：that + adj.（+ a/ an + n.），相当于so及how的用法，即that(so/ how) big a difference —那么（如此/多么）大的一个区别（影响）。我一个月赚2000,60对我来说没多大区别